Home / 136,681.20-188,340.12-100,814.40

Finding the Fourth Proportional to 136,681.20, 188,340.12 and 100,814.40

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Solution

The fourth proportional to 136,681.20, 188,340.12 and 100,814.40 is: 138,917.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,681.20 : 188,340.12 = 100,814.40 : x
  2. Step 2: Convert to fraction form
    136,681.20/188,340.12 = 100,814.40/x
  3. Step 3: Cross multiply
    136,681.20x = 188,340.12 × 100,814.40
  4. Step 4: Simplify right side
    136,681.20x = 18,987,396,193.73
  5. Step 5: Solve for x
    x = 18,987,396,193.73/136,681.20
  6. Step 6: Final answer
    x = 138,917.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.